Malicious PDF — malware analysis report

Static analysis result for SHA-256 c45f3b1977ce8da0…

MALICIOUS

PDF

39.3 KB Created: 2020-08-23 23:22:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0f0c5a822825da4b23a2e39e79fbb36c SHA-1: 5057e16f4d7ccafc7aaec90b67c461ad4bf63fd9 SHA-256: c45f3b1977ce8da07d02ffc688b3da3c3ac2cfe0178488511d23bb82f5564f1f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a lure related to an 'authorization release form for background check' and embeds multiple links. One critical heuristic indicates the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=authorization+release+form+for+background+check'. This suggests the document is designed to redirect users to malicious sites, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=authorization+release+form+for+background+check In PDF document text
    • http://files.pinkdazeeboutique.com/uploads/1/3/0/7/130740123/3197081.pdfIn PDF document text
    • http://files.ontracksimulation.com/uploads/1/3/0/8/130874201/vafodadonaz_taxivawidifogu.pdfIn PDF document text
    • http://files.melissaairy.com/uploads/1/3/0/7/130775245/dipovoxujuzif-kabemugaloj.pdfIn PDF document text
    • http://files.fbmarion.org/uploads/1/3/0/7/130776828/pururux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8862/5316/files/14369402079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1141/4943/files/lobokovegozusibosenisisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0047/9391/files/31957651248.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/lidipudotefemegod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6714/6397/files/madiremozasemokifujegex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/jejipixaremajis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5868/3291/files/22867759560.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0334/7098/files/super_mario_bros_emulator_ios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/cracking_codes_with_python_free_download.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C77 5676 bytes
SHA-256: c4f1bafaf9c9a0468ba983311e7af31e5acac134161547aee41742ed4c0c65a1
font_01_sfnt_off00006fa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA3 9596 bytes
SHA-256: 2083c02f90ecb65fef398471313b5e7dc998411c8acfaaa8f1900b610911b9f6

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